Summary of the invention
Object to be solved by this invention is to provide a kind of low-loss flat transmission line, and screening effectiveness is high, easily processes, and transmission line profile is lower.
For solving the problem, the present invention proposes a kind of low-loss flat transmission line, comprising:
Intermediate layer, it comprises at least two dielectric layers and at least one intermediate connecting layer, and each intermediate connecting layer, between two dielectric layers, is connected by adhesive layer between dielectric layer and/or between dielectric layer and intermediate connecting layer;
Lay respectively at the first articulamentum and second articulamentum of intermediate layer upper surface and lower surface; And be positioned at the side articulamentum of Liang Ge side, intermediate layer; Side articulamentum is connected with the first articulamentum, the second articulamentum with the transmission line screen formed around coated intermediate layer.
According to one embodiment of present invention, described intermediate layer comprises first medium layer, second dielectric layer and intermediate connecting layer; Intermediate connecting layer between first medium layer and second dielectric layer, and is provided with an adhesive layer between intermediate connecting layer and first medium layer.
According to one embodiment of present invention, described intermediate layer comprises first medium layer, second dielectric layer, the 3rd dielectric layer and intermediate connecting layer; Intermediate connecting layer between first medium layer and second dielectric layer, and is provided with an adhesive layer between intermediate connecting layer and first medium layer; Connected by another adhesive layer between second dielectric layer and the 3rd dielectric layer.
According to one embodiment of present invention, also comprise and lay respectively at the first articulamentum and the second articulamentum away from the first insulating barrier on the surface in intermediate layer and the second insulating barrier.
According to one embodiment of present invention, described first articulamentum, the second articulamentum and the articulamentum of side articulamentum all for being coated by electrically-conducting paint.
According to one embodiment of present invention, described first articulamentum, the second articulamentum and side articulamentum are metal system conductive coating, burning system conductive coating, nanotube conductive coating, carbon slurry coating or conductive paint coating.
According to one embodiment of present invention, the intermediate connecting layer near the first articulamentum is provided with at least one holding wire, and the shape of holding wire is straight line or curve; Two ends of this intermediate connecting layer are held with being equipped with, between ground end and holding wire, is separated with gap; Ground end is by connecting side articulamentum and the first articulamentum, the second articulamentum conducting ground connection.
According to one embodiment of present invention, also comprise two signal terminals, two signal terminals are arranged on described two ends respectively, heart yearn and the holding wire of signal terminal connect, the earth terminal of signal terminal and the ground end of two ends connect, be equipped with opening in described corresponding described two end of each layer on the intermediate connecting layer of the first articulamentum, signal terminal stretches out in the described opening of each layer, and the pad of signal terminal is fixed on two ends of this intermediate connecting layer.
According to one embodiment of present invention, the region that the holding wire in described two ends is connected with the discord side articulamentum on ground end is provided with insulating barrier, and this insulating barrier exposes the pad of signal terminal.
According to one embodiment of present invention, also comprise the stiffener for strengthening fixing described signal terminal, it is located at two ends of transmission line and compresses end.
After adopting technique scheme, the present invention has following beneficial effect compared to existing technology: adopt the side articulamentum in both sides, intermediate layer and the first articulamentum, the second articulamentum to constitute the transmission line screen be coated on outside intermediate layer, the signal transmitted in the intermediate layer coated for it is compared via scheme and is served better shielding action, and without the need to adopting via to carry out each articulamentum of conducting, processing is simple, and thickness can be thinning.
In addition, each articulamentum forming transmission line screen can be coated by conducting paints such as silver slurry, aluminium paste or carbon slurries and form, and save adhesive layer required when individual layer connecting plate connects, manufacture craft is simple.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.
Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar popularization when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
The effect independent with adhesive layer of the independent effect of dielectric layer of the present invention, articulamentum and adhesive layer and dielectric layer disclosed in the patent of invention mentioned in background technology, articulamentum is substantially identical, and the dielectric layer brought due to the integrally-built difference of transmission line of the present invention, articulamentum and adhesive layer will be described in detail below as one of transmission line overall effect is different.
Embodiment one
Referring to Fig. 1, in the present embodiment, the intermediate layer of transmission line comprises the dielectric layer 31 ', adhesive layer 41 ', intermediate connecting layer 23 ' and the dielectric layer 32 ' that stack gradually.Transmission line also comprises the articulamentum 21 ' be located on dielectric layer 31 ', is located at the articulamentum 22 ' under dielectric layer 32 ', and is located at the articulamentum 24 ' and 25 ' of both sides, intermediate layer.In one embodiment, insulating barrier 11 ' and 12 ' can also be established on the articulamentum 21 ' of transmission line and under articulamentum 22 '.Insulating barrier 11 ' and 12 ' has been used for insulating effect, is that when being made up of conductor paste, insulating barrier 11 ' and 12 ' can play protection articulamentum 21 ' and 22 ' further at articulamentum 21 ' and 22 '.
It should be noted that, the articulamentum in the intermediate layer shown in Fig. 1 and the number of plies of dielectric layer are only examples, be not restricted to this, certainly more articulamentum and dielectric layer can also be increased, according to circumstances between the layer needing physical adhesion, add adhesive layer, preferably, the base material of each adhesive layer is low temperature adhesion material, or other can realize the material of adhesive effect.Dielectric layer is used to transmitting energy (ripple), and the base material of dielectric layer can be that adopt arbitrarily can the dielectric material of transmitting energy, preferably adopts low-loss dielectric material.Intermediate connecting layer can be only one deck articulamentum, also can be multilayer articulamentum, when intermediate connecting layer is multilayer, the Signal transmissions between intermediate connecting layer is realized by the form of the via of each intermediate connecting layer of configuration connection, and by signal is drawn out to outside transmission line by that layer of intermediate connecting layer near articulamentum 21 ', each intermediate connecting layer is folded between two dielectric layers, also connect by adhesive layer therebetween, or also can be the form (adopting existing one side conductive medium layer material) of articulamentum and dielectric layer one, just adhesive layer is not needed between such articulamentum and dielectric layer.
Wherein, articulamentum 21 ' and 22 ' is located at the upper and lower surface in intermediate layer respectively, intermediate layer comprises the dielectric layer 31 ', adhesive layer 41 ', intermediate connecting layer 23 ' and the dielectric layer 32 ' that stack gradually, and namely articulamentum 21 ' is arranged on dielectric layer 31 ', articulamentum 22 ' is arranged under dielectric layer 32 '.When having insulating barrier, insulating barrier 11 ' is arranged on articulamentum 21 ', and insulating barrier 12 ' is arranged under articulamentum 22 ', fits tightly between each layer and each layer.Articulamentum 24 ' is positioned on a side in intermediate layer, articulamentum 25 ' is positioned on the another side in intermediate layer, can see in Fig. 1, articulamentum 21 ', 22 ', 24 ' and 25 ' around outside coated intermediate layer, because articulamentum is electric conducting material, interact with the earth, the signal of transmission line can not leak outside transmission line, it also avoid external disturbance, because of but good transmission line screen, articulamentum 24 ' and 25 ' is simultaneously also by articulamentum 21 ', 22 ' links together thus realizes the conducting shielding action of outer articulamentum, without the need to carrying out conducting articulamentum 21 ' with via again, 22 ', solve the difficult processing problem of via complicated technology.
Referring to Fig. 4, intermediate connecting layer 23 ' is provided with at least one holding wire 233, the shape of holding wire 233 is straight line or curve; Two ends of this intermediate connecting layer 23 ' hold 231 with being equipped with, between ground end 231 and holding wire 233, is separated with gap 232; Ground end 231 is by connecting the articulamentum 24 ' and 25 ' of side and articulamentum 21 ' and 22 ' conducting ground connection.When intermediate connecting layer has multiple, be provided with holding wire near on the intermediate connecting layer of articulamentum 21 ', other intermediate connecting layer can be provided with holding wire, also can be set to the ground end not establishing holding wire.
Referring to Fig. 2 and Fig. 3, transmission line also comprises two signal terminals 51, two signal terminals 51 are arranged on two ends of intermediate connecting layer 23 ' respectively, signal terminal 51 is installed the end of intermediate connecting layer 23 ' by SMT (SurfaceMountTechnology, surface mounting technology) mode and signal is drawn out to transmission line outside.When intermediate connecting layer has multiple, signal terminal 51 is arranged on respectively on two ends of the intermediate connecting layer of articulamentum 21 '.Heart yearn and the holding wire 233 of signal terminal 51 connect, the earth terminal of signal terminal 51 and the ground end 231 of two ends connect, opening is equipped with in the position of dielectric layer 31 ', the corresponding described signal terminal of articulamentum 21 ', signal terminal stretches out in the opening of dielectric layer 31 ', articulamentum 21 ', and the pad of signal terminal 51 is fixed on two ends of this intermediate connecting layer 23 '.
Fig. 5 shows structure when not install signal terminal near the end of intermediate connecting layer of articulamentum 21 ', composition graphs 1 and Fig. 5, the end margin place, ground of end couples together with articulamentum 24 '/25 ' (articulamentum 24 '/25 ' represents the extension of articulamentum 24 ' and articulamentum 25 '), be used for ground connection, with on this ground end 233, (the holding wire part of end is used for being connected with the heart yearn pad of signal terminal 51 on the holding wire 231 of end, the ground end portion of end is used for being connected with the ground pad of signal terminal 51, coupling part is not covered by insulating barrier) the region that connects of discord side articulamentum be provided with insulating barrier 234, be used for protecting the metal level of this part on the holding wire 233 of this end and ground end 231 not oxidized, but ground end 231 and part holding wire 233 being used for be connected with the pad 52 (being ground pad and heart yearn pad respectively) of signal terminal 51, this insulating barrier 234 does not cover.
Fig. 6 shows structure when to have installed signal terminal near the end of intermediate connecting layer of articulamentum 21 ', and the pad of signal terminal 51 and the ground end 231 of end, holding wire connect fixing, and joining part exposes outside insulating barrier 234.Fig. 5 and Fig. 6 illustrate only the structure of an end, should be appreciated that the structure of the other end also can be so.
Articulamentum 21 ' is provided with in the embodiment of insulating barrier 11 ', the position of dielectric layer 31 ', articulamentum 21 ' and insulating barrier 11 ' respective signal terminal 51 is equipped with opening, signal terminal 51 stretches out in the opening of dielectric layer 31 ', articulamentum 21 ' and insulating barrier 11 ', the size of opening should be considered and can not have influence on shield effectiveness and determine as far as possible, the pad 52 of signal terminal 51 is fixed on intermediate connecting layer, can carry out a glue to pad and add strong adhesive power, some glue amount is depending on connecting pad 52 size.
Further, articulamentum 21 ', 22 ', 24 ' and 25 ' conductor articulamentum all for being coated by conducting paints, such as articulamentum 21 ', 22 ', 24 ' and 25 ' is metal system conductive coating, burning system conductive coating, nanotube conductive coating, carbon slurry coating or conductive paint coating, preferably silver slurry coating, aluminium paste coating or carbon slurry coating, conductor paste is arranged in intermediate layer according to required form and (comprises dielectric layer by being meant to of coating, adhesive layer and intermediate connecting layer) outward, it can be silk screen printing process, not only manufacture craft is simple, advantages of good shielding performance, and eliminated the adhesive layer of bonding connection layer effect, save material.
Embodiment two
Referring to Fig. 7, a kind of low-loss flat transmission line of the present embodiment, comprises articulamentum 21, dielectric layer 31, adhesive layer 41, intermediate connecting layer 23, dielectric layer 32, adhesive layer 42, dielectric layer 33, articulamentum 22 and articulamentum 24 and articulamentum 25.In one embodiment, insulating barrier 11 and 12 can also be established on the articulamentum 21 of transmission line and under articulamentum 22.Insulating barrier 11 and 12 has been used for insulating effect, is that when being made up of conductor paste, insulating barrier can play a part to protect articulamentum further at articulamentum 21 and 22.
It should be noted that, the number of plies of the articulamentum shown in Fig. 7 and dielectric layer is only an example, be not restricted to this, certainly more articulamentum and dielectric layer can also be increased, according to circumstances between the layer needing physical adhesion, add adhesive layer, preferably, the base material of each adhesive layer is low temperature adhesion material, or other can realize the material of adhesive effect.Dielectric layer is used to transmitting energy (ripple), and the base material of dielectric layer can be that adopt arbitrarily can the dielectric material of transmitting energy, preferably adopts low-loss dielectric material.Intermediate connecting layer can be only one deck articulamentum, also can be multilayer articulamentum, when intermediate connecting layer is multilayer, the Signal transmissions between intermediate connecting layer is realized by the form of the via of each intermediate connecting layer of configuration connection, and by signal is drawn out to outside transmission line by that layer of intermediate connecting layer near articulamentum 21, each intermediate connecting layer is folded between two dielectric layers, also connect by adhesive layer therebetween, or also can be the form (adopting existing one side conductive medium layer material) of articulamentum and dielectric layer one, just adhesive layer is not needed between such articulamentum and dielectric layer.
Wherein, articulamentum 21 and articulamentum 22 are located at the upper and lower surface in intermediate layer respectively, intermediate layer comprises dielectric layer 31, adhesive layer 41, articulamentum 23, dielectric layer 32, adhesive layer 42 and the dielectric layer 33 stacked gradually, and namely articulamentum 21 is arranged on dielectric layer 31, articulamentum 22 is arranged under dielectric layer 33.When having insulating barrier, insulating barrier 11 is arranged on articulamentum 21, and insulating barrier 22 is arranged under articulamentum 22, fits tightly between each layer and each layer.Articulamentum 24 is positioned on a side in intermediate layer, articulamentum 25 is positioned on the another side in intermediate layer, can see in Fig. 5, articulamentum 21, 22, 24 and 25 around outside coated intermediate layer, because articulamentum is electric conducting material, interact with the earth, the signal of transmission line can not leak outside transmission line, it also avoid external disturbance, thus good transmission line screen is defined, articulamentum 24 and 25 is simultaneously also by articulamentum 21, 22 link together thus realize the conducting shielding action of outer articulamentum, without the need to carrying out conducting articulamentum 21 with via again, 22, solve the difficult processing problem of via complicated technology.
Illustrate only the intermediate connecting layer 23 that number is 1 in Fig. 7, other intermediate connecting layer can also be set between other dielectric layers, be configured according to the arrangement of actual conditions to the line number signal on each intermediate connecting layer, holding wire and ground.Being connected by adhesive layer between dielectric layer, can be arrange adhesive layer between dielectric layer and dielectric layer, also can be provided with adhesive layer and articulamentum between dielectric layer and dielectric layer.
The transmission line of Fig. 7 is carried out blast signal by Fig. 8, each layer is all strip and becomes at two ends roomy flat, in the present embodiment, intermediate connecting layer and a dielectric layer integration are formed as connecting media layer 26, that is adopt the dielectric layer of one side conductor to define connecting media layer 26, the conductor material of this one side conductive medium layer is such as copper conductor.The conductor surface of the dielectric layer of one side conductor can form at least one signal line, and and the holding wire ground end of being separated by by gap, the shape of holding wire can be straight line, curve or other shapes, referring to the relevant specific descriptions in embodiment one, can not repeat them here about holding wire and the related embodiment such as ground end and signal terminal.
In addition, Fig. 8 is exploded perspective view, because articulamentum 21,22,24 and 25 links together, can be described as be integrally formed (coated by conductor paste form time), therefore in order to make diagram more short and sweet, in the exploded perspective view of Fig. 8 and not shown articulamentum 22,24 and 25.
Continue referring to Fig. 8, transmission line also comprises the stiffener 6 for strengthening fixed signal terminal 51, be located at two ends of transmission line and compress transmission line end, the end of transmission line is more more roomy than mid portion.This stiffener also can be applied in other embodiments of the present invention and go.
Further, articulamentum 21, 22, 24 and 25 conductor articulamentums all for being coated by conducting paints, such as articulamentum 21, 22, 24 and 25 are metal system conductive coating, burning system conductive coating, nanotube conductive coating, carbon slurry coating or conductive paint coating, preferably silver slurry coating, aluminium paste coating or carbon slurry coating, conductor paste is arranged in intermediate layer according to required form and (comprises dielectric layer by being meant to of coating, adhesive layer and intermediate connecting layer) outward, it can be silk screen printing process, not only manufacture craft is simple, advantages of good shielding performance, and eliminated the adhesive layer of bonding connection layer effect, save material.
The present invention adopts the side articulamentum in both sides, intermediate layer and the first articulamentum, the second articulamentum to constitute the transmission line screen be coated on outside intermediate layer, the signal transmitted in the intermediate layer coated for it is compared via scheme and is served better shielding action, and without the need to adopting via to carry out each articulamentum of conducting, processing is simple, and thickness can be thinning.
In addition, each articulamentum forming transmission line screen can be coated by conductor pastes such as silver slurry, aluminium paste or carbon slurries and form, and save adhesive layer required when individual layer connecting plate connects, manufacture craft is simple.
Although the present invention with preferred embodiment openly as above; but it is not for limiting claim; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible variation and amendment, the scope that therefore protection scope of the present invention should define with the claims in the present invention is as the criterion.